Tag Archives: threshold

Infra-red film helped photojournalist ‘step over the threshold’ to capture war’s impact

It wasn’t until he began taking a more artistic approach that Richard Mosse felt his photographs were truly capturing the horror of the conflict in the Congo, the artist told a group of undergraduates and graduates on Feb. 5.

Mosse spoke about the process behind his most recent project, “The Enclave,” at the Yale School of Art. The talk was sponsored by the Poynter Fellowship in Journalism. (more…)

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CU Research Shows Warming Climate Threatens Ecology at Mountain Research Site West of Boulder

A series of papers published this month on ecological changes at 26 global research sites — including one administered by the University of Colorado Boulder in the high mountains west of the city — indicates that ecosystems dependent on seasonal snow and ice are the most sensitive to changes in climate.

The six papers appeared in the April issue of the journal BioScience. The papers were tied to data gathered at sites in North America, Puerto Rico, the island of Moorea near Tahiti, and Antarctica, which are known as Long-Term Ecological Research, or LTER, sites and are funded by the National Science Foundation. CU-Boulder’s Niwot Ridge site, one of the five original LTER sites designated by NSF in 1980, encompasses several thousand acres of subalpine forest, tundra, talus slopes, glacial lakes and wetlands stretching up to more than 13,000 feet on top of the Continental Divide. (more…)

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Researchers Find Ocean Temperature Threshold for Hurricanes is Rising

Average observed tropical (black) and estimated SST (blue) rose together in the last 30 years. Image credit: University of Hawaii at Mānoa

Scientists have long known that atmospheric convection in the form of hurricanes and tropical ocean thunderstorms tends to occur when sea surface temperature rises above a threshold. So how do rising ocean temperatures with global warming affect this threshold?  If the threshold does not rise, it could mean more frequent hurricanes.

 

A new study by researchers at the International Pacific Research Center (IPRC) of the University of Hawaii at Mānoa shows this threshold sea surface temperature for convection is rising under global warming at the same rate as that of the tropical oceans. Their paper appears in the Advance Online Publications of Nature Geoscience. (more…)

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